Finding the Fourth Proportional to 9,906.83, 13,671.60 and 5,430.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,906.83 : 13,671.60 = 5,430.30 : x
2. Step 2: Convert to fraction form
   9,906.83/13,671.60 = 5,430.30/x
3. Step 3: Cross multiply
   9,906.83x = 13,671.60 × 5,430.30
4. Step 4: Simplify right side
   9,906.83x = 74,240,793.97
5. Step 5: Solve for x
   x = 74,240,793.97/9,906.83
6. Step 6: Final answer
   x = 7,493.90